Breville BCG600SIL impeller replacement - help

hi there,

I am new here and was hoping someone could help me with my Breville BCG600SIL grinder impeller replacement. I google and found the website ifix.com instruction on the BCG860 model however unable to find any instruction on BCG600 model. I struggle to remove the top cover and was hoping someone who have done it before would provide me some thought how to remove and replace the impeller or maybe an exploded view of the product therefore i could find a ways to fix the grinder. Anyone? Many thank